iPhone Concept Investment

I was really intrigued by this story on NPR about Apple’s stock price and Kyle Conroy’s compilation of Apple prices vs. today’s Apple stock value because… I’ve been taking part in exactly this sort of “concept investment”.
Before the iPhone was released, I had looked back at Apple’s stock and noticed that if I had bought Apple stock instead of an iPod, I would have had thousands of dollars instead of an aging (but still working) iPod. This thought gave rise to my “free iPhone” plan, instead of buying an iPhone, I would buy the equivalent in Apple stock. When increase in Apple stock price and decrease in iPhone price converged, I would use my investment gains to buy an iPhone. As an added benefit, Apple would be on the second or third generation of the product by then, and I would be able to get the latest technology.
The iPhone was first available for purchase on June 29, 2007. I didn’t have a trading account at the time, and I missed that day by a couple days while I set up an account, but by July 7, 2007, I had $1000 in an account and purchased 5 shares of stock for $672.80. The larger 8GB version was priced at $599, so that was as close as I could come to the real price without being under.
My project was off to a great start; by September of that year, the price of the 8GB phone was down to $399. I was well on my way to a free iPhone, but the stock didn’t rise as fast as I was hoping:
The stock rose until the end of 2007. At Christmas I had *almost* enough gains to buy an iPhone, but not quite. The stock tanked and by October of the following year, I had lost money. That’s when I got tired of waiting and abandoned the experiment… I bought a 16 GB iPhone 3G.
I should have done this experiment with an iPhone 3G, because the stock doubled in value from October 2008 to October 2009. I still have the investment, and today I have nearly doubled my money. My account has $613 more than it did when I started, so clearly I could have bought an iPhone by now, even without a data plan.